Meet Downton Abbey's newest characters for Season 4, as the show heads into the Roaring Twenties. Jazz, movies and a post-war culture clash with the Crawleys' stodgy way of life. Will they adapt?
The new season premiered on PBS on Sunday. Here's a peek at what's in store for the lords and servants of the grand estate this season.

Downton Abbey actresses, 2013. They are left to right: Joanne Froggatt, Elizabeth McGovern and Michelle Dockery.

Photo: Michael Tran, FilmMagic

Downton Abbey actresses, 2013. They are left to right: Joanne...

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Lady Edith (Laura Carmichael) goes bohemian and independent in Season 4, as she steps out of the shadow of sister Mary. And her outfits get sexier; think slinky dresses, high slits, and no corsets. Should be fun to watch.

Photo: Nick Briggs

Lady Edith (Laura Carmichael) goes bohemian and independent in...

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Laura Carmichael, 2013.

Photo: Amanda Edwards, WireImage

Laura Carmichael, 2013.

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Lady Edith gets to spend a lot of time in London in Season 4 of Downton Abbey.

Photo: Nick Briggs

Lady Edith gets to spend a lot of time in London in Season 4 of...

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Laura Carmichael, at the Scottish Fashion Awards, on Oct. 9, 2013.

Photo: David M. Benett

Laura Carmichael, at the Scottish Fashion Awards, on Oct. 9, 2013.

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Jack Ross (Gary Carr) is one of Downton Abbey's new characters. He's a charming American jazz singer who dances with Lady Rose, igniting racial conflict in stuffy old England.

Photo: Nick Briggs

Jack Ross (Gary Carr) is one of Downton Abbey's new characters....

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Gary Carr is pictured on at the Savoy Hotel on Oct. 24, 2013 in London.

Photo: Danny Martindale, WireImage

Gary Carr is pictured on at the Savoy Hotel on Oct. 24, 2013 in...

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Lady Rose (Lily James) returns for Season 4, where her youthful spirit is part of a modern, post-war generation.

Lady Rose (Lily James) returns for Season 4, where her youthful...

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British actress Lily James is pictured at the Lawrence Olivier Awards on April 28, 2013 in London.

Photo: LEON NEAL, AFP/Getty Images

British actress Lily James is pictured at the Lawrence Olivier...

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Lily James poses at the National Television Awards in London on Jan. 23, 2013, where she won a Drama award for "Downton Abbey."

Photo: Dave M. Benett, Getty Images

Lily James poses at the National Television Awards in London on...

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Downton Abbey's Season 4 is set in 1922, with social strata changing at a rapid pace. The Downton estate is at risk, but the footmen, butlers and valets still look crisp.

Daisy (Sophie McShera) is back in the kitchen for Season 4, crushing on footman Alfred and jealous of under-maid Ivy.

Photo: Nick Briggs, Carnival Films

Daisy (Sophie McShera) is back in the kitchen for Season 4,...

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Sophie McShera, 2013.

Photo: Vera Anderson, WireImage

Sophie McShera, 2013.

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Flirty kitchen maid Ivy (Cara Theobold) is also back in Season 4 and part of a romantic triangle.

Photo: Nick Briggs

Flirty kitchen maid Ivy (Cara Theobold) is also back in Season 4...

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Cara Theobold is pictured on Nov. 9, 2013 in London.

Photo: David M. Benett, Getty Images For Lacoste

Cara Theobold is pictured on Nov. 9, 2013 in London.

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Life got pretty tragic for former chauffeur Tom Branson (Allen Leech). Season 4 explores his choices as a past servant and current widower and single dad.

Life got pretty tragic for former chauffeur Tom Branson (Allen...

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Allen Leech, 2013.

Photo: Stuart C. Wilson, Getty Images

Allen Leech, 2013.

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Season 4 introduces Lord Anthony Gillingham (Tom Cullen), an old childhood friend of Mary's. And perhaps a potential suitor?

Photo: Nick Briggs

Season 4 introduces Lord Anthony Gillingham (Tom Cullen), an old...

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Tom Cullen, 2013.

Photo: David M. Benett, Getty Images For The Lulu Guinne

Tom Cullen, 2013.

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One character who's not returning for Season 4: Lady maid O'Brien (center, Siobhan Finneran). But her character hasn't been killed off, so maybe there's a chance her forehead bangs will make a return.

Photo: Carnival Films

One character who's not returning for Season 4: Lady maid O'Brien...

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Devious maid O'Brien may be gone, but MyAnna Buring, pictured, returns in Season 4 as conniving lady's maid Edna, who flirted with Branson. Buring is pictured in 2013.

Photo: Danny Martindale, WireImage

Devious maid O'Brien may be gone, but MyAnna Buring, pictured,...

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Acclaimed actor Paul Giamatti guest-stars in Season 4 of Downton Abbey, in which he plays Lady Cora's brother, Harold Levinson.

Photo: Jim Spellman, WireImage

Acclaimed actor Paul Giamatti guest-stars in Season 4 of Downton...

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A preview image of Downton Abbey's Christmas episode, scheduled to air in the United Kingdom in 2013. The episode will feature actors Paul Giamatti and Shirley MacClaine, pictured in the center.

Photo: Carnival Films

A preview image of Downton Abbey's Christmas episode, scheduled to...

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Charles Blake is another new character for Season 4. He's a modern thinker with muddy motives, and sparks fly between him and Lady Mary.

Photo: Nick Briggs, Carnival Films

Charles Blake is another new character for Season 4. He's a modern...

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Still in mourning, Lady Mary (left, Michelle Dockery) wears a lot of black in Season 4. But her lady's maid Anna (right, Joanne Froggatt) is happily married. Will the good times last? "There's "another upset in the cards," Froggatt warned.

Joanne Froggatt is pictured Sept. 30, 2013 at the London premiere of the movie "Filth."

Photo: Fred Duval, FilmMagic

Joanne Froggatt is pictured Sept. 30, 2013 at the London premiere...

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Brendan Coyle (L) and Joanne Froggatt play the happiest couple in Downton Abbey, John and Anna Bates.
Or do they? Expect changes in Season 4.

Photo: David M. Benett, Getty Images

Brendan Coyle (L) and Joanne Froggatt play the happiest couple in...

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Nigel Harman, left, plays another new Downton character, the charming valet "Green," who works for Lord Gillingham.
Harman is pictured with Simon Cowell in Sept. of 2013, promoting their project, "I Can't Sing - The X Factor Musical."

Photo: David M. Benett, Getty Images

Nigel Harman, left, plays another new Downton character, the...

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Brendan Patricks had a small part as Evelyn Napier, a boring suitor for Mary, in Season 1 of Downton. He's back for Season 4.

Photo: Dave Hogan, Getty Images

Brendan Patricks had a small part as Evelyn Napier, a boring suitor...

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Worried that the funniest character - the Dowager Countess (left, Maggie Smith) - wouldn't be back for Season 4? No worries. She's back to lecture her stuffed shirt of a son, Robert (Lord Grantham, not pictured).

Photo: CARNIVAL FILM , NYT

Worried that the funniest character - the Dowager Countess (left,...

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Maggie Smith (C) watches some Wimbledon in 2013.

Photo: GLYN KIRK, AFP/Getty Images

Maggie Smith (C) watches some Wimbledon in 2013.

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Shirley MacLaine also returns for Season 4, in which she plays Lady Grantham's tart-tongued American mom.

Photo: CARNIVAL FILM, NYT

Shirley MacLaine also returns for Season 4, in which she plays Lady...

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Shirley MacLaine is pictured with Geraldo Rivera at the FOX News Channel's headquarters in New York on Nov. 14, 2013.

Photo: D Dipasupil, Getty Images

Shirley MacLaine is pictured with Geraldo Rivera at the FOX News...

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Mrs. Patmore (left, Lesley Nicol) is also back in the kitchen with Daisy (right, Sophie McShera).

Photo: Nick Briggs

Mrs. Patmore (left, Lesley Nicol) is also back in the kitchen with...

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Sophie McShera (L) and Lesley Nicol attend a "Book of Mormon" event in London in 2013.

Phyllis Logan (center) returns as calm, kind housekeeper Mrs. Hughes. But will Mrs. Hughes and Carson finally get together?
Who knows, but Season 4 sees her "moral strength tested to the limit," the show says. (There's a lot of limit-testing in Downton). Logan is pictured with fellow Downton actresses.

Photo: Amanda Edwards, WireImage

Phyllis Logan (center) returns as calm, kind housekeeper Mrs....

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Phyllis Logan plays housekeeper Mrs. Hughes on "Downton Abbey."

Photo: Handout, McClatchy-Tribune News Service

Phyllis Logan plays housekeeper Mrs. Hughes on "Downton Abbey."

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Phyllis Logan attends the Sirius XM's Entertainment Weekly Town Hall series with the cast of 'Downton Abbey' at SiriusXM Studios on Dec. 12, 2013, in New York City.

Phyllis Logan attends the Sirius XM's Entertainment Weekly Town...

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Will Carson remain the servant rock of the Downton Abbey? Season 4 hints at a small, revealing crack in his buttoned-up exterior.

Photo: Nick Briggs

Will Carson remain the servant rock of the Downton Abbey? Season 4...

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New Zealand soprano Dame Kiri Te Kanawa also plays a new character on Downton. She plays - you guessed it - an opera singer.

Photo: Neilson Barnard, Getty Images

New Zealand soprano Dame Kiri Te Kanawa also plays a new character...

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The storyline for under-butler Thomas (Rob James-Collier) took a heart-breaking turn in Season 3. Does he return to his manipulative ways? "His self-interest knows almost no bounds," say the show's press materials.

Photo: Nick Briggs

The storyline for under-butler Thomas (Rob James-Collier) took a...

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Rob James-Collier, 2013.

Photo: Michael Tran, FilmMagic

Rob James-Collier, 2013.

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Lady Grantham (Elizabeth McGovern) also starts Season 4 in sadness.

Photo: Nick Briggs

Lady Grantham (Elizabeth McGovern) also starts Season 4 in sadness.

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Lady Mary (Michelle Dockery) as a single mom.

Photo: Nick Briggs, Associated Press

Lady Mary (Michelle Dockery) as a single mom.

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Michelle Dockery (L) and Laura Carmichael reprise their roles as the Crawley sisters in "Downton Abbey's" Season 4. They're pictured on August 6, 2013 in Beverly Hills, California.